Image capturing lens assembly, image capturing device and vehicle photographing terminal

Abstract

An image capturing lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. The first lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The second and third lens elements have refractive power. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. The sixth lens element with refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image capturing lens assembly has a total of six lens elements with refractive power.

What is claimed is: 
     
       1. An image capturing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element;
 wherein the first lens element has negative refractive power, the fourth lens element has an object-side surface being convex in a paraxial region thereof, the fifth lens element has an object-side surface being concave in a paraxial region thereof, the sixth lens element has an object-side surface being convex in a paraxial region thereof, at least one of the object-side surface and an image-side surface of the sixth lens element has at least one inflection point in an off-axis region thereof, and the object-side surface and the image-side surface of the sixth lens element are both aspheric; 
 wherein an absolute value of a curvature radius of the image-side surface of the sixth lens element is larger than an absolute value of a curvature radius of the object-side surface of the sixth lens element, a curvature radius of an object-side surface of the second lens element and a curvature radius of an image-side surface of the fifth lens element have a same sign, and an absolute value of a curvature radius of an image-side surface of the third lens element is larger than an absolute value of the curvature radius of the object-side surface of the second lens element; 
 wherein a maximal field of view of the image capturing lens assembly is FOV, and the following condition is satisfied:
   120 deg.≤FOV<200 deg..
 
 
 
     
     
       2. The image capturing lens assembly of  claim 1 , wherein the fifth lens element has negative refractive power;
 wherein a focal length of the first lens element is f1, the curvature radius of the object-side surface of the second lens element is R3, and the following condition is satisfied:
   | f 1 /R 3|<1.4. 
 
 
     
     
       3. The image capturing lens assembly of  claim 1 , wherein the sixth lens element has positive refractive power;
 wherein a focal length of the second lens element is f2, a focal length of the third lens element is f3, and the following condition is satisfied:
   | f 2/ f 3|<2.0. 
 
 
     
     
       4. The image capturing lens assembly of  claim 1 , wherein at least three of the six lens elements of the image capturing lens assembly are made of plastic material. 
     
     
       5. The image capturing lens assembly of  claim 1 , wherein the object-side surface and an image-side surface of the fourth lens element are both aspheric, the object-side surface and the image-side surface of the fifth lens element are both aspheric, and a central thickness of the third lens element is larger than an axial distance between the second lens element and the third lens element. 
     
     
       6. The image capturing lens assembly of  claim 1 , wherein there is a gap in a paraxial region between each of adjacent lens elements of the image capturing lens assembly, and a central thickness of the third lens element is larger than an axial distance between the third lens element and the fourth lens element. 
     
     
       7. The image capturing lens assembly of  claim 1 , further comprising an aperture stop disposed between the third lens element and the fourth lens element, wherein an absolute value of a focal length of the third lens element is larger than an absolute value of a focal length of the second lens element. 
     
     
       8. An image capturing device, comprising:
 the image capturing lens assembly of  claim 1 ; and 
 an image sensor located on or near an image plane of the image capturing lens assembly. 
 
     
     
       9. A vehicle photographing terminal, comprising:
 the image capturing device of  claim 8 . 
 
     
     
       10. An image capturing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element;
 wherein the first lens element has negative refractive power, the fourth lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof, the fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, the sixth lens element has an object-side surface being convex in a paraxial region thereof, at least one of the object-side surface and an image-side surface of the sixth lens element has at least one inflection point in an off-axis region thereof, and the object-side surface and the image-side surface of the sixth lens element are both aspheric; 
 wherein an absolute value of a curvature radius of the image-side surface of the sixth lens element is larger than an absolute value of a curvature radius of the object-side surface of the sixth lens element, a curvature radius of an object-side surface of the second lens element and a curvature radius of an image-side surface of the second lens element have a same sign, an axial distance between the second lens element and the third lens element is larger than an axial distance between the third lens element and the fourth lens element, and an absolute value of a curvature radius of an image-side surface of the third lens element is larger than an absolute value of a curvature radius of an object-side surface of the fourth lens element. 
 
     
     
       11. The image capturing lens assembly of  claim 10 , wherein the sixth lens element has positive refractive power;
 wherein a focal length of the second lens element is f2, a focal length of the third lens element is f3, and the following condition is satisfied:
     |f 2/ f 3|<2.0. 
 
 
     
     
       12. The image capturing lens assembly of  claim 10 , wherein the object-side surface and the image-side surface of the fourth lens element are both aspheric, and the object-side surface and an image-side surface of the fifth lens element are both aspheric;
 wherein a focal length of the first lens element is f1, the curvature radius of the object-side surface of the second lens element is R3, and the following condition is satisfied:
   | f 1 /R 3|<1.4. 
 
 
     
     
       13. The image capturing lens assembly of  claim 10 , wherein there is a gap in a paraxial region between each of adjacent lens elements of the image capturing lens assembly, and an axial distance between the image-side surface of the sixth lens element and an image plane is larger than the axial distance between the second lens element and the third lens element. 
     
     
       14. The image capturing lens assembly of  claim 10 , wherein a maximum effective radius of the object-side surface of the second lens element is larger than a maximum effective radius of the object-side surface of the fourth lens element. 
     
     
       15. The image capturing lens assembly of  claim 10 , wherein a central thickness of the second lens element is larger than the axial distance between the third lens element and the fourth lens element. 
     
     
       16. The image capturing lens assembly of  claim 10 , wherein an absolute value of a focal length of the third lens element is larger than an absolute value of a focal length of the sixth lens element. 
     
     
       17. The image capturing lens assembly of  claim 10 , wherein a refractive index of the first lens element is larger than a refractive index of the fifth lens element. 
     
     
       18. An image capturing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element;
 wherein the first lens element has negative refractive power, the fourth lens element has an object-side surface being convex in a paraxial region thereof, the fifth lens element has an object-side surface being concave in a paraxial region thereof, the sixth lens element has an object-side surface being convex in a paraxial region thereof, at least one of the object-side surface and an image-side surface of the sixth lens element has at least one inflection point in an off-axis region thereof, and the object-side surface and the image-side surface of the sixth lens element are both aspheric; 
 wherein an absolute value of a curvature radius of the image-side surface of the sixth lens element is larger than an absolute value of a curvature radius of the object-side surface of the sixth lens element, a central thickness of the second lens element is larger than an axial distance between the third lens element and the fourth lens element, and an absolute value of a curvature radius of an image-side surface of the third lens element is larger than an absolute value of a curvature radius of an object-side surface of the first lens element; 
 wherein a maximal field of view of the image capturing lens assembly is FOV, and the following condition is satisfied:
   120 deg.≤FOV<200 deg..
 
 
 
     
     
       19. The image capturing lens assembly of  claim 18 , wherein the third lens element has positive refractive power, and there is a gap in a paraxial region between each of adjacent lens elements of the image capturing lens assembly. 
     
     
       20. The image capturing lens assembly of  claim 18 , wherein a focal length of the first lens element is f1, a curvature radius of an object-side surface of the second lens element is R3, and the following condition is satisfied:
   | f 1/ R 3|<1.4. 
 
     
     
       21. The image capturing lens assembly of  claim 18 , wherein an absolute value of a focal length of the third lens element is larger than an absolute value of a focal length of the second lens element. 
     
     
       22. The image capturing lens assembly of  claim 18 , wherein the absolute value of the curvature radius of the image-side surface of the third lens element is larger than an absolute value of a curvature radius of an image-side surface of the fifth lens element.